Automatic double gate



(No Model.) J. AUSTIN 8v, R. CHAMBERLAIN.

AUTOMATIC DOUBLE GATE.

No. 272,619. Patented Feb. 20, 1883.

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AUTOMATIC DOUBLE GATE.

SPECIFICATION forming part of Letters Patent No. 272,619, dated February 20, 1883.

Application filed September 7, 1882. (No model.) I

To all whom it may concern:

Be it known that we, JOSIAH AUSTIN and Rossco CHAMBERLAIN, of East Liberty,in the county of Logan and State of Ohio, have invented a new and Improved Automatic Double Gate, of which the following is a specification.

()ur invention relates to improvements in gates in which certain devices are actuated by the wheels of an approaching vehicle to open the gate, and by a reverse similar action to close the sameias the vehicle departs; and it has for its object to adapt a double gate, more correctly described as two gates hinged to posts at opposite sides of the road and meeting in the center of the road, to be operated on the principle described in our Patent No. 251,498. issued December 27, 1881.

To this end it consists in the mechanism hereinafter described and set forth, reference, being had to the accompanying drawings, in which- Figure 1 represents an elevation, partly in section, of our invention. Fig. 2 is a sectional view of the upper hinge.

A A represent the gates; B B, the poststo which they are hinged, standing on opposite sides of the road.

0 is a vertical rod stepped in a vertical projection of sleeve E, and revolving at the top in the center of the circular horizontal plate H, serving as a pivot on which the hinges F and G and the cam a revolve.

The oflice of cam a, acting upon the gate by means of roller b on the shank of hinge F, is explained in our former patent referred to, and it may be actuated by a similar toothed rack or by the device shown in Fig. 6 of said patent; but we here show a new device for that purpose.

The cam a is provided at its under rear edge with a segment of bevel-gear teeth, a, which mesh into a mate gear-segment, c, of double the radius of gear a, secured to the rock-shaft L, which extends across beneath the roadway, and is journaled in hearings in the two posts B. The sleeve E is supported upon the shaft L, which is free to revolve therein, and it is kept in place longitudinally on the shaft by means of the collar f and the gear-segment c, secured to the shaft, one on each side of it.

M is a trip-lever attached to or extending from segment 0 as a portion of the same casting, or secured to the rock-shaft directly, to serve as an attachment for the connection H 'of the aforesaid patent, and to be operated thereby to rock the shaft and actuate the gearsegments 0 a and cam a to open or close the gate. In case the gate crosses a pavement the trip-lever M may extend downward from rockshaft L to form an underground connection with the rod H referred to.

The hinge G, resting on plate H, is the principal support of the gate, to which it is attached at such a height as to leave but little weight to be supported on the rock-shaft when the gate is at rest. The plate H is provided with a shank to secure it to post B.

J is a sleeve fitted to slide vertically upon the pivot-rod O, with which it is caused to revolve by a pin, K, secured in rod 0, passing through a vertical slot in sleeve J. Said sleeve is extended to form a broad flange at its top, provided with a concentric annular groove, in which two or more rollers or balls, N, circulate, serving as friction-rollers between flange J and the under side of plate H.

I is a spiral spring surrounding rod 0, abutting against sleeve J, and operating against the bracket or hinge D, which is secured to the gate, for the purpose of maintaining continual engagement between the toothed segments a c by pressing the gate upon the cam a. All

the parts described are duplicated on the opposite gate A, except that there is no necessity for repeating the rod H of the former patent referred to, nor its attaching trip-lever M, as the shaft L serves both gates alike.

The advantage of this improvement over our former patent consists, chiefly, in the use of two gates to span the same roadway formerly spanned by one, thus lightening the weight upon the drivinggear, which is a great object to attain, especially when the gates are made of iron.

hat we claim, and wish to secure by Letters Patent, is-

1. The combination, with the two gates A and their operating-cams a, provided with segments of beveled-gear teeth a, of the shaft L, extending across the road and j ournaled in the gate-posts, the sleeve E, supported on said shaft, the hinge-rod (3, stepped in the sleeve E, the two beveled-gear segments 0, engaging the gear-teeth a. provided with crank-arms M and secured upon the shaft; L, and means for operating the arms M. substantially as specified, whereby the oscillating of either arin M operates upon'the cams on to open or close both gates, as shown and described.

2. The combination, with the gate A, hinges G H F, and pivot-rod C, of the sleeve E, mounted upon shaft L, and provided with an upward extension, in which rod 0 is stepped, vas shown and described.

3. The combination, with the gate A and its 15 operating-gear described, of the hinge H, the sleeve J, provided with a vertical slot, the pin K therein, secured in rod 0, the spring I, and the bracket or hinge D, as specified.

JOSIAH AUSTIN. ROSSOO OHAMBE tLAIN. WVitnesses:

JosEPH H. LAWRENCE, JOHN 0. SWEET. 

